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Copycat Cosmic Brownies – The Ultimate Fudgy, Rich, Chocolatey

Shruthi
These Copycat Cosmic Brownies feature an ultra-fudgy chocolate brownie base that is rich, chewy, and decadent. A smooth layer of chocolate ganache covers each brownie, creating the signature glossy finish. Colorful candy-coated chocolate pieces add crunch and visual appeal. The brownies are easy to prepare with simple pantry ingredients and can be made ahead of time. Perfect for parties, celebrations, and everyday indulgence, these homemade treats capture the nostalgic flavor of the classic snack while delivering a gourmet homemade experience.
Print Recipe
Prep Time 20 minutes
Cook Time 1 hour 30 minutes
Total Time 1 hour 50 minutes
Course Dessert
Cuisine American
Calories 340 kcal

Ingredients
  

For the Brownies

  • 1 cup unsalted butter, melted
  • 1½ cups granulated sugar
  • 1 cup brown sugar
  • 4 large eggs
  • 2 teaspoons vanilla extract
  • 1 cup unsweetened cocoa powder
  • 1 cup all-purpose flour
  • 1 tablespoon cornstarch

For the Ganache Topping

  • 1 cup semi-sweet chocolate chips
  • ½ cup heavy cream

For Decoration

  • ½ cup rainbow candy-coated chocolate chips

Instructions
 

  • Preheat oven to 350°F (175°C).Line a 9×13-inch baking pan with parchment paper.Lightly grease the paper.
  • In a large bowl, whisk melted butter, granulated sugar, and brown sugar.Add eggs one at a time.
  • Stir in vanilla extract.Sift in cocoa powder, flour, salt, and cornstarch.Mix until just combined.
  • Pour batter into prepared pan.Spread evenly.Bake for 28–32 minutes.
  • A toothpick should come out with a few moist crumbs.Cool completely.
  • Heat heavy cream until steaming.Pour over chocolate chips
  • Let sit for 2 minutes.Stir until smooth and glossy.
  • Pour ganache over cooled brownies.Spread evenly.
  • Sprinkle rainbow candy-coated chocolates on top.Refrigerate for 30–45 minutes.
  • Lift brownies from pan.Cut into squares.Enjoy chilled or at room temperature.

Notes

  • Use high-quality cocoa powder for the best flavour.
  • Do not overbake to maintain a fudgy texture.
  • Brown sugar adds moisture and chewiness.
  • Chilling creates the classic Cosmic Brownie texture.
  • Cornstarch helps keep brownies soft.
  • Allow brownies to cool before adding ganache.
  • Store in an airtight container.
  • Brownies taste even better the next day.
Keyword chocolate dessert, copycat recipe, Cosmic Brownies, fudgy brownies, homemade brownies, Lunchbox Treat